Fix AcrylicBrush Missing on NavigationView in Windows 10 SDK 17763

Microsoft released a new version of Windows 10 UWP SDK Build 17763, you can check the What's New document for more details. But when I retarget my App to version 17763, something unexpected happens, the AcrylicBrush gone missing if I change my App runtime to version 17763.

I am not sure if this is by design on 17763 or it is a bug, I am trying to contact Microsoft product group on this problem. For now, I can address a workaround for this problem.

If you don't understand the problem I am talking about, here's a simple test.

Many thanks. We where test crawling our website and noticed a difference in the URLs. Now we know why :) It's already hard to keep consistency when developing applications in a team. Now even need to be more careful with selecting which UrlEncode to use by default.